It also bears mentioning that, after all the wrangling about fuel surcharges and higher fees, now that fuel costs are lower and the recession is here, fares are much, much lower. For instance, in January there's:

IAH-SAN-IAH: $218
IAH-BOS-IAH: $304
IAH-DTW-IAH: $188
IAH-SFO-IAH: $228
IAH-PDX/SEA-IAH: $238
IAH-LHR-IAH: $609 all-in
IAH-CDG-IAH: $661 all-in
IAH-AMS-IAH: $727 all-in
etc.